Lukas posted a condolence
I have realized that in unnwtaed cameras, specialized receptors help to concentrate automatically. The sensors involving some cameras change in contrast, while others make use of a beam with infra-red (IR) light, specially in low light. Higher spec cameras oftentimes use a mixture of both devices and will often have Face Priority AF where the video camera can See' any face as you concentrate only in that. Thank you for sharing your notions on this site.
